I have a system with 4 TS101s in 1 JTAG chian. Sometimes(not everytime), when the 3rd TS101 access memory space 0x1000000~0xfffffff(0x0~0xffffff is always ok), "JTAG scan failed" displays, and the 3rd TS101 cannot work. However, the other 3 TS101s can work correctly.
I have check the circuit, DSP codes and FPGA codes. There is nothing different between the 3rd one and the others.
Please help me. Thanks very much.